How Ricardo swam more laps in

Given this information, which expression must represent the value of b?

Which of the following situations represents a linear relationship? a. theresa increases the distance she runs by 0.1 miles every week. b. the volume of a box depends on the length of box. c. the amount of money in a bank account increases by 1 percent each year. d. the population of a town doubles every 5 years.

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles